INSERT-VALVE SEAT 2N8943 - Caterpillar

System Operation Description:Many of the troubleshooting procedures direct you to a specific electrical connector. Use the following test steps to help determine whether the connector is the cause of the problem. If a problem is found in a connector, repair the connector and verify that the problem is corrected.Intermittent electrical problems are often caused by poor connections. Always check for an active diagnostic code before you open any connection. Immediately after you reconnect the connector, check for codes again. Sometimes, simply disconnecting a connector and then reconnecting the connector can solve a problem. If this occurs, the following conditions are likely causes:
Loose terminals
Bent terminals
Improperly crimped terminals
Improperly mated connectors
Moisture
Corrosion
Illustration 1 g00700045
The MS connectors have a metal housing. The pins and the sockets are soldered to the electrical wires. The solder connections are usually protected by a chemical potting which prevents access to the solder point.
Illustration 2 g00700064
Deutsch connectors have a plastic housing. The pins and the sockets are crimped onto the electrical wires. The connector has a locking mechanism in order to hold the pins and the sockets. These connectors are repairable without cutting the wires.Use the following test steps in order to thoroughly inspect the connectors and determine if the connectors are the cause of the problem.Test Step 1. Check the Connectors.
Always set the engine control to the OFF/RESET mode before you inspect electrical conductors. Remove the electrical power from the engine.
For the MS connectors, make sure that the receptacle is turned fully in the clockwise direction. Check that the threading is properly aligned and securely mated.
For the Deutsch HD connectors, make sure that the plug and the receptacle are aligned properly with the index markings. Make sure that the receptacle is turned fully in the clockwise direction. Verify that the receptacle is clicked into the locked position. Make sure that the two halves cannot be pulled apart.
For the Deutsch DT style, make sure that the orange wedge is used in order to lock the pins. Check that the receptacle has clicked into the locked position. Make sure that the two halves cannot be pulled apart.Expected Result:All connectors are properly mated and free of damage.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Repair the connectors and/or replace the connectors. Reconnect all of the connectors.STOPTest Step 2. Perform a Pull Test on Each Wire Connection.
Each terminal and each connector should easily withstand 45 N (10 lb) of pull and each wire should remain in the connector body. This test checks whether the wire was properly crimped in the terminal and whether the terminal was properly inserted into the connector.
The DT connectors use an orange wedge to lock the terminals in place. Ensure that the orange wedge is not missing and that the orange wedge is installed properly on the DT connectors.Note: Terminals should ALWAYS be crimped onto the wires with a crimp tool. Do not solder terminals. Use the 1U-5804 Crimp Tool .Expected Result:Each terminal and each connector easily withstands 45 N (10 lb) of pull and each wire